I received my first EM (Janome 350E) for Mother's Day 2010. I had 2 problems- where to put it and how to thread it with the large thread cones.
I solved the first problem by using a "baker's cart" that we had in storage to set it on. I use the pull out shelves below to store threads and everything else I need is in reach on the baker's cart behind the EM. The multi-spool thread holder sits on the shelf above it. The cart is next to the covered bumper pool table and this gives me lots of project space. I like that the baker's cart is on wheels because if I do an intensive thread color change project while I am sewing, I can move it to where I am sitting. If I'm not sewing I can just pull up a bar stool or see it from standing height while in the room.
The large Metro thread cones I bought did not fit on the EM's horizontal spool holder. I used a drinking cup and a D ring. The baker's cart has a wire top shelf and frame built into the back. I attached the C hook to the bottom of the top shelf. It dangles about 20 inches above the cup which sits behind the EM and holds the thread cone. This gives the thread enough height to prevent the thread from kinking and twisting. It then feeds through a binder clip that is attached to the EM handle. From there it goes around the plastic bobbin winder latch and reaches the same level as if it where on the horizontal spool before going into the first threading area.
The URL above will link to my Picassa Album to show the details.
I have tried using a purchased thread holder but I can't get enough height to keep the thread from twisting. I have used this setup for about 6 weeks now and find that I really like it.